class Counter:
    def __init__(self, value):
        self.data = value

    def increaseValue(self):
        self.data = self.data + 1

    def deceraseValue(self):
        self.data = self.data - 1

    def getValue(self):
        print "value = %s" % self.data

Instance1 = Counter(0)

Instance1.increaseValue()
Instance1.getValue()

Instance1.deceraseValue()
Instance1.deceraseValue()
Instance1.getValue()

Instance2 = Counter(10)

Instance2.increaseValue()
Instance2.getValue()

Instance2.deceraseValue()
Instance2.deceraseValue()
Instance2.getValue()